CN112477641A - Power supply device - Google Patents

Power supply device Download PDF

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Publication number
CN112477641A
CN112477641A CN202010933440.8A CN202010933440A CN112477641A CN 112477641 A CN112477641 A CN 112477641A CN 202010933440 A CN202010933440 A CN 202010933440A CN 112477641 A CN112477641 A CN 112477641A
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CN
China
Prior art keywords
phase
switching element
charger
battery
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010933440.8A
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Chinese (zh)
Inventor
大畠弘嗣
高松直义
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of CN112477641A publication Critical patent/CN112477641A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/14—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/16—Regulation of the charging current or voltage by variation of field
    • H02J7/24—Regulation of the charging current or voltage by variation of field using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/487—Neutral point clamped inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Ac Motors In General (AREA)
  • Inverter Devices (AREA)

Abstract

The invention provides a power supply device, which can charge a storage battery through a three-phase AC charger without additionally arranging a conversion circuit for converting three-phase AC voltage output from the three-phase charger into DC voltage. The power supply device includes: a storage battery; a capacitor unit in which a first capacitor and a second capacitor are connected in series between positive and negative terminals of a battery; and a power converter having a three-level inverter including a first switching element, a second switching element, a third switching element, a fourth switching element, a first diode, and a second diode, and connected in parallel to the battery in three phases of a U-phase, a V-phase, and a W-phase, the power converter including: 3 connection terminals electrically connectable to 3 terminals of the three-phase AC charger, at least one of between the first switching element and the second switching element of the three phases and between the third switching element and the fourth switching element of the three phases; and a control device for controlling the on/off switching of each switching element.

Description

Power supply device
Technical Field
The present invention relates to a power supply device.
Background
The power converter provided in the electric vehicle described in patent document 1 is configured to use an inverter for driving a motor generator as a part of a function of a charger. Thus, the vehicle-mounted components for charging the battery as the storage battery using a single-phase AC (Alternating Current) charger as an external charger can be minimized, and the weight and price of the electric vehicle can be reduced.
Further, patent document 1 discloses the following technique: when the battery is charged by the single-phase AC charger, switching between on and off of each switching element of the inverter is controlled so that the voltage supplied from the single-phase AC charger to the motor generator is positive and the voltage supplied from the battery to the motor generator is negative.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2007 and 252074
Disclosure of Invention
Problems to be solved by the invention
However, since the technique disclosed in patent document 1 is for single-phase AC charging in which a battery is charged by a single-phase AC charger, a conversion circuit for converting a three-phase AC voltage output from the three-phase AC charger into a DC (Direct Current) voltage is additionally required in order to use the technique for three-phase AC charging in which a battery is charged by a three-phase AC charger.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a power supply device capable of charging a battery by a three-phase AC charger without separately providing a conversion circuit for converting a three-phase AC voltage output from the three-phase charger into a DC voltage.
Means for solving the problems
In order to solve the above problems and achieve the object, a power supply device according to the present invention includes: a storage battery; a capacitor unit in which a first capacitor and a second capacitor are connected in series between a positive electrode-side terminal and a negative electrode-side terminal of the battery; and a power converter in which a three-level inverter capable of outputting a three-level voltage to the motor generator is connected in parallel with the battery in three phases of U-phase, V-phase, and W-phase, the three-level inverter being configured by a first switching element, a second switching element, a third switching element, and a fourth switching element connected in series, a first diode, and a second diode, and turning on/off the first switching element, the second switching element, the third switching element, and the fourth switching element, the first diode connecting between the first switching element and the second switching element and between the first capacitor and the second capacitor, the second diode connecting between the third switching element and the fourth switching element and between the first capacitor and the second capacitor, the power supply device is characterized by comprising: 3 connection terminals electrically connectable to 3 terminals of a three-phase AC charger, at least one of between the first switching element and the second switching element or between the third switching element and the fourth switching element of each of the three-phase three-level inverters; and a control device that, when the 3 connection terminals are electrically connected to the 3 terminals of the three-phase AC charger between the first switching element and the second switching element of each of the three-level inverters for three phases, charges the first capacitor and sets the voltage of the second capacitor to 0[ V ] with the battery before the battery is charged with the three-phase AC charger, and controls switching of on and off of the third switching element and the fourth switching element for three phases so that a three-phase AC voltage output from the three-phase AC charger is converted into a DC voltage between the third switching element and the fourth switching element of each of the three-level inverters when the battery is charged with the three-phase AC charger, when the 3 connection terminals are electrically connected to the 3 terminals of the three-phase AC charger, the second capacitor is charged by the battery before the battery is charged by the three-phase AC charger, and the voltage of the first capacitor is set to 0[ V ], and when the battery is charged by the three-phase AC charger, the first switching element and the second switching element of the three phases are turned on, and switching of on and off of the third switching element and the fourth switching element of the three phases is controlled, so that the three-phase AC voltage output from the three-phase AC charger is converted into a DC voltage.
Effects of the invention
The power supply device according to the present invention is capable of converting a three-phase AC voltage output from a three-phase AC charger into a DC voltage and charging a battery by a power converter that converts the DC voltage from the battery into a three-phase AC voltage when supplying power from the battery to a motor generator. Therefore, the power supply device according to the present invention has the following effects: the battery can be charged by the three-phase AC charger without separately providing a conversion circuit for converting the three-phase AC voltage output from the three-phase charger into a DC voltage.
Drawings
Fig. 1 is a configuration diagram of an electric power system including a power supply device according to an embodiment.
Fig. 2 is a block diagram showing a configuration of an electric power system according to the embodiment.
Fig. 3 is a diagram showing a first circuit state before charging a battery by a three-phase AC charger.
Fig. 4 is a diagram showing a second circuit state before the battery is charged by the three-phase AC charger.
Fig. 5 is a diagram showing a third circuit state before the battery is charged by the three-phase AC charger.
Fig. 6 is a diagram showing a circuit state when the battery is charged by a three-phase AC charger.
Detailed Description
Hereinafter, embodiments of the power supply device according to the present invention will be described. The present invention is not limited to the embodiment.
Fig. 1 is a configuration diagram of an electric power system including a power supply device 10 according to an embodiment. The Electric power system according to the embodiment is applied to an Electric Vehicle that can travel using Electric power, such as an Electric Vehicle, a Hybrid Vehicle, and a PHV (Plug-in Hybrid Vehicle), a REEV (Range Extended Electric Vehicle).
The power system according to the embodiment includes a power supply device 10, a motor generator 20, a three-phase AC charger 30, and the like. Further, the power supply device 10 and the motor generator 20 in the power system according to the embodiment are mounted on the electrically-powered vehicle, and the three-phase AC charger 30 is provided in an external charging device or the like provided outside the electrically-powered vehicle.
The power supply device 10 includes a battery 12, a system main relay device 14, a capacitor Unit 16, a power converter 18, a charging relay device 40, an ECU (Electronic Control Unit) 60, and the like. The power supply device 10 is electrically connected to the motor generator 20.
The battery 12 is a storage battery that can be charged and discharged as a high-voltage battery. As the battery 12, for example, a nickel-cadmium battery, a lead storage battery, or the like can be used in addition to a lithium ion battery pack and a nickel hydrogen battery pack.
System main relay device 14 includes a system main relay SMR-B, a system main relay SMR-G, a system main relay SMR-P, a reactor 140, and the like. In addition, "B" of system main relay SMR-B means connection to the positive electrode side of battery 12. "G" of the system main relay SMR-G means connection to the negative electrode side of the battery 12. "P" of system main relay SMR-P means precharge.
System main relay SMR-B is provided on positive bus bar 22 connected to the positive terminal of battery 12. System main relay SMR-B is switched between on and off by receiving a control signal from ECU60 (see fig. 2), which is an electronic control unit (not shown) to be described later.
System main relay SMR-G is provided on negative bus bar 24 connected to the negative terminal of battery 12. The system main relay SMR-G switches between on and off by receiving a control signal from the ECU 60.
System main relay SMR-P and reactor 140 are connected in parallel to system main relay SMR-G. System main relay SMR-P is connected in series to reactor 140. The system main relay SMR-P switches between on and off by receiving a control signal from the ECU 60. The reactor 140 is used to suppress a rush current from flowing when the battery 12 is connected to the power converter 18.
The capacitor unit 16 includes a capacitor C1 as a first capacitor and a capacitor C2 as a second capacitor connected in series with each other between a positive electrode-side terminal (positive bus 22) of the battery 12 and a negative electrode-side terminal (negative bus 24) of the battery 12. The capacitor C1 and the capacitor C2 are connected to each other at the neutral point NP 1. That is, one terminal of the capacitor C1 is connected to the positive bus 22, and the other terminal is connected to the neutral point NP 1. Capacitor C2 has one terminal connected to neutral point NP1 and the other terminal connected to negative bus 24. Therefore, if the capacitors C1 and C2 are charged and discharged in the same manner and always store the same charge, the voltage between the neutral point NP1 and the negative bus bar 24, that is, the neutral point voltage is clamped to a voltage half of the voltage of the battery 12. The neutral point voltage corresponds to a voltage VC2 which is a voltage between terminals of the capacitor C2. In addition, VC1 in fig. 1 is the inter-terminal voltage of the capacitor C1.
Power converter 18 includes an upper arm to which a positive side voltage, which is a voltage between positive bus 22 and neutral point NP1, is supplied, and a lower arm to which a negative side voltage, which is a voltage between neutral point NP1 and negative bus 24, is supplied. In power converter 18, the upper arm and the lower arm are arranged in a multiplex manner between positive bus 22 and negative bus 24, and can output three-level three-phase AC voltage to motor generator 20.
Further, the power converter 18 includes: a U-phase arm that outputs a U-phase voltage to motor generator 20; a V-phase arm that outputs a V-phase voltage to motor generator 20; and a W-phase arm that outputs a W-phase voltage to motor generator 20.
In the U-phase arm, a first switching element SU1, a second switching element SU2, a third switching element SU3, and a fourth switching element SU4 are connected in series in this order from the positive bus 22 toward the negative bus 24. Each of the switching elements SU1, SU2, SU3, and SU4 has a structure in which a free wheeling diode is connected in parallel in reverse to the semiconductor element. The reverse connection is, for example, a connection of a cathode terminal of a diode to a collector terminal of the semiconductor element and a connection of an anode terminal of the diode to an emitter terminal of the semiconductor element. At an intermediate point PU1 (first intermediate point) serving as a connection portion between the first switching element SU1 and the second switching element SU2 and an intermediate point PU2 (second intermediate point) serving as a connection portion between the third switching element SU3 and the fourth switching element SU4, the two diodes DU1 and DU2 connected in series are connected such that the anode side is connected to the intermediate point PU2 and the cathode side is connected to the intermediate point PU 1. A connection point between the two diodes DU1, DU2 is connected to the neutral point NP1 of the capacitor unit 16. In this configuration, a U-phase voltage is output to motor generator 20 from a connection point between second switching element SU2 and third switching element SU 3.
In the V-phase arm, a first switching element SV1, a second switching element SV2, a third switching element SV3, and a fourth switching element SV4 are connected in series in this order from the positive bus 22 toward the negative bus 24. Each of the switching elements SV1, SV2, SV3, and SV4 has a structure in which a free wheeling diode is connected in parallel in reverse to the semiconductor element. At an intermediate point PV1 (first intermediate point) as a connection portion between the first switching element SV1 and the second switching element SV2 and an intermediate point PV2 (second intermediate point) as a connection portion between the third switching element SV3 and the fourth switching element SV4, the two diodes DV1, DV2 connected in series are connected in such a manner that the anode side is connected to the intermediate point PV2 and the cathode side is connected to the intermediate point PV 1. The connection point between the two diodes DV1, DV2 is connected to the neutral point NP1 of the capacitor unit 16. In this configuration, a V-phase voltage is output to motor generator 20 from a connection point between second switching element SV2 and third switching element SV 3.
In the W-phase arm, a first switching element SW1, a second switching element SW2, a third switching element SW3, and a fourth switching element SW4 are connected in series in this order from the positive bus 22 toward the negative bus 24. The switching elements SW1, SW2, SW3 and SW4 are connected in parallel with a free wheeling diode in a reverse direction with respect to the semiconductor element. At an intermediate point PW1 (first intermediate point) which is a connection portion between the first switching element SW1 and the second switching element SW2 and an intermediate point PW2 (second intermediate point) which is a connection portion between the third switching element SW3 and the fourth switching element SW4, the two diodes DW1, DW2 connected in series are connected such that the anode side is connected to the intermediate point PW2 and the cathode side is connected to the intermediate point PW 1. The connection point between the two diodes DW1, DW2 is connected to the neutral point NP1 of the capacitor unit 16. In this configuration, a W-phase voltage is output to the motor generator 20 from a connection point between the second switching element SW2 and the third switching element SW 3.
In the present embodiment, as each switching element of the power converter 18, an IGBT (Insulated Gate Bipolar Transistor) or the like can be used.
The motor generator 20 is a rotating electrical machine mounted on the electric vehicle, and functions as a motor when a DC voltage output from the battery 12 is converted into a three-phase AC voltage by the power converter 18 and supplied, and generates a driving force for running the vehicle. On the other hand, motor generator 20 functions as a generator when the vehicle brakes, recovers braking energy, and outputs the recovered braking energy as a three-phase AC voltage. Then, the three-phase AC voltage is converted into a DC voltage by the power converter 18 and supplied to the battery 12, thereby charging the battery 12.
The three-phase AC charger 30 is an external charger provided outside the vehicle to charge the battery 12. The three-phase AC charger 30 has an a terminal 32A, B terminal 32B and a C terminal 32C, which are 3 terminals electrically connected to the power supply device 10 side, in the charger connection portion 50 for connecting an unillustrated plug of the three-phase AC charger 30 to an unillustrated connector on the vehicle side. Between charger connection unit 50 and power converter 18, charging relay device 40 having charging relay 42A, charging relay 42B, and charging relay 42C, and reactors 44A, 44B, and 44C are provided.
Terminal a 32A of three-phase AC charger 30 is electrically connected to switching element SU3 and intermediate point PU2 of switching element SU4 in the U-phase arm of power converter 18 via charging relay 42A and reactor 44A. Further, B terminal 32B of three-phase AC charger 30 is electrically connected to switching element SV3 and intermediate point PV2 of switching element SV4 in the V-phase arm of power converter 18 via charging relay 42B and reactor 44B. Further, C terminal 32C of three-phase AC charger 30 is electrically connected to intermediate point PW2 between switching element SW3 and switching element SW4 in the W-phase arm of power converter 18, via charging relay 42C and reactor 44C.
The a terminal 32A, B and the C terminal 32C of the three-phase AC charger 30 may be electrically connected to at least one of intermediate points PU1, PV1, and PW1 between the first switching element and the second switching element, or intermediate points PU2, PV2, and PW2 between the third switching element and the fourth switching element, among the U-phase arm, the V-phase arm, and the W-phase arm, respectively.
That is, the a terminal 32A of the three-phase AC charger 30 may be electrically connected to the intermediate point PU1 between the first switching element SU1 and the second switching element SU2 in the U-phase arm, the B terminal 32B of the three-phase AC charger 30 may be electrically connected to the intermediate point PV1 between the first switching element SV1 and the second switching element SV2 in the V-phase arm, and the C terminal 32C of the three-phase AC charger 30 may be electrically connected to the intermediate point PW1 between the first switching element SW1 and the second switching element SW2 in the W-phase arm.
As described above, in the power supply device 10 according to the embodiment, 3 connection terminals electrically connectable to the a terminal 32A, B terminal 32B and the C terminal 32C of the three-phase AC charger 30 are provided in at least one of the U-phase arm, the V-phase arm, and the W-phase arm between the first switching element and the second switching element, or between the third switching element and the fourth switching element. In the present embodiment, intermediate points PU1, PV1, and PW1 can be used as 3 connection terminals provided between the first switching elements SU1, SV1, and SW1 and the second switching elements SU2, SV2, and SW2 in the U-phase arm, the V-phase arm, and the W-phase arm. In the present embodiment, intermediate points PU2, PV2, and PW2 can be used as 3 connection terminals provided between the third switching elements SU3, SV3, and SW3 and the fourth switching elements SU4, SV4, and SW4 in the U-phase arm, the V-phase arm, and the W-phase arm.
In addition, 3 connection terminals electrically connectable to the a terminal 32A, B terminal 32B and the C terminal 32C of the three-phase AC charger 30 may be provided only between the first switching elements SU1, SV1, SW1 and the second switching elements SU2, SV2, SW2 in the U-phase arm, the V-phase arm, and the W-phase arm. In addition, 3 connection terminals electrically connectable to the a terminal 32A, B terminal 32B and the C terminal 32C of the three-phase AC charger 30 may be provided only between the third switching elements SU3, SV3, SW3 and the fourth switching elements SU4, SV4, SW4 in the U-phase arm, the V-phase arm, and the W-phase arm.
Fig. 2 is a block diagram showing a configuration of an electric power system according to the embodiment. The ECU60 is an electronic control device that controls the operation of the power supply device 10 and the like. The ECU60 includes the charge control unit 62, the gate signal generation unit 64, and the like. In fig. 2, "VB" is a battery voltage, and "VH" is a charging voltage.
A charging power command signal output from a system control unit not shown, a voltage phase signal output from a voltmeter not shown provided in the power converter 18, and a charging current signal i output from an ammeter not shown provided in the power converter 18A、iB、iCAnd various signals such as a charger information signal output from the three-phase AC charger 30 are input to the charging control section 62. The charging control unit 62 controls the charging current so that the effective power becomes a charging power command value and the ineffective power becomes 0. The charging control unit 62 is based on, for example, a charging power command signal, a voltage phase signal, and a charging current signal iA、iB、iCThe obtained a-phase duty ratio (duty) for switching on and off of the switching elements SU3 and SU4 for the U-phase, the B-phase duty ratio for switching on and off of the switching elements SV3 and SV4 for the V-phase, the C-phase duty ratio for switching on and off of the switching elements SW3 and SW4 for the W-phase, and the like are output to the gate signal generating unit 64.
When the a terminal 32A of the three-phase AC charger 30 is electrically connected to the midpoint PU1, the B terminal 32B of the three-phase AC charger 30 is electrically connected to the midpoint PV1, and the C terminal 32C of the three-phase AC charger 30 is electrically connected to the midpoint PW1, the charging controller 62 outputs an a-phase duty ratio for switching on and off of the switching elements SU1 and SU2 for the U phase, a B-phase duty ratio for switching on and off of the switching elements SV1 and SV2 for the V phase, a C-phase duty ratio for switching on and off of the switching elements SW1 and SW2 for the W phase, and the like to the gate signal generator 64.
The gate signal generating unit 64 generates a gate signal for switching on and off of each switching element of the power converter 18, and outputs the generated gate signal to each switching element. For example, when the battery 12 is charged by the three-phase AC charger 30, the gate signal generating unit 64 outputs a gate signal for switching on and off at an a-phase duty ratio to the switching elements SU3 and SU4 of the U phase, outputs a gate signal for switching on and off at a B-phase duty ratio to the switching elements SV3 and SV4 of the V phase, and outputs a gate signal for switching on and off at a C-phase duty ratio to the switching elements SW3 and SW4 of the W phase.
When the a terminal 32A of the three-phase AC charger 30 is electrically connected to the intermediate point PU1, the B terminal 3B of the three-phase AC charger 30 is electrically connected to the intermediate point PV1, and the C terminal 32C of the three-phase AC charger 30 is electrically connected to the intermediate point PW1, the gate signal generator 64 outputs a gate signal for switching on and off at the a-phase duty ratio to the switching elements SU1 and SU2 of the U-phase, outputs a gate signal for switching on and off at the B-phase duty ratio to the switching elements SV1 and SV2 of the V-phase, and outputs a gate signal for switching on and off at the C-phase duty ratio to the switching elements SW1 and SW2 of the W-phase, when the battery 12 is charged by the three-phase AC charger 30.
Next, a method of charging the battery 12 by the three-phase AC charger 30 in the power supply device 10 shown in fig. 1 will be described. First, in the power supply apparatus 10, the ECU60 turns off all the switching elements of the system main relays SMR-B, SMR-G, SMR-P of the system main relay apparatus 14, the charging relays 42A, 42B, and 42C of the charging relay apparatus 40, and the power converter 18, respectively. At this time, the electric charges are discharged from the capacitors C1 and C2 through the power lines, and the voltages of the capacitors C1 and C2 become 0[ V ].
Next, as shown in fig. 3, the ECU60 switches the first switching elements SU1, SV1, SW1, second switching elements SU2, SV2, SW2, third switching elements SU3, SV3, SW3 of the power converter 18 from off to on, respectively. As shown in fig. 3, the conductive switching element is surrounded by a circle.
Next, as shown in fig. 4, the ECU60 switches the system main relay SMR-B, SMR-P of the system main relay device 14 from off to on, thereby starting charging of the capacitor C2 with electric power from the battery 12 and charging the capacitor C2 to a voltage of 800[ V ].
After the charging of the capacitor C2 is completed, the ECU60 switches the system main relay SMR-G of the system main relay device 14 from off to on, and switches the system main relay SMR-P from on to off, as shown in fig. 5. The ECU60 switches the third switching elements SU3, SV3, and SW3 of the power converter 18 from on to off.
Next, as shown in fig. 6, the ECU60 switches the charging relays 42A, 42B, and 42C of the charging relay device 40 from off to on, and starts charging the battery 12 with the electric power from the three-phase AC charger 30. At this time, the ECU60 controls the capacitor C2, the switching elements SU3 and SU4 of the U phase, the switching elements SV3 and SU4 of the V phase, and the switching elements SW3 and SW4 of the W phase as a two-level inverter, and uses them as a three-phase AC-DC converter. Specifically, ECU60 controls on/off switching of switching elements SU3 and SU4 of the U-phase at the a-phase duty ratio, on/off switching of switching elements SV3 and SV4 of the V-phase at the B-phase duty ratio, and on/off switching of switching elements SW3 and SW4 of the W-phase at the C-phase duty ratio, thereby converting the three-phase AC voltage of three-phase AC charger 30 into a DC voltage and charging battery 12 with the converted DC voltage.
In the power supply device 10 according to the embodiment, when the battery 12 is charged by the three-phase AC charger 30, the first switching elements SU1, SV1, and SW1 and the second switching elements SU2, SV2, and SW2 of the power converter 18 are fixed to be on. This prevents the motor generator 20 from rotating due to the generation of driving force in the motor generator 20 by interrupting the supply of electric power to the motor generator 20.
In addition, unlike the power supply apparatus 10 shown in fig. 3 to 6, when intermediate points PU1, PV1, and PW1 formed by the first switching elements SU1, SV1, and SW1 and the second switching elements SU2, SV2, and SW2 are electrically connected to the a terminal 32A, B terminal 32B and the C terminal 32C of the three-phase AC charger 30, the ECU60 controls the power supply apparatus 10 and the like as described below, and the battery 12 is charged by the three-phase AC charger 30. That is, the switching elements to be switched on and off are appropriately switched by the ECU60, and the battery 12 is charged by the three-phase AC charger 30 through the same steps as those described with the power supply device 10 shown in fig. 3 to 6.
First, before charging the battery 12 by the three-phase AC charger 30, the ECU60 charges the capacitor C1 with power from the battery 12 to a voltage of 800[ V ], and makes the voltage of the capacitor C2 0[ V ]. Then, when the battery 12 is charged by the three-phase AC charger 30, the ECU60 turns on the third switching elements SU3, SV3, SW3 and the fourth switching elements SU4, SV4, SW4 of the three phases, and controls the switching of on and off of the first switching elements SU1, SV1, SW1 and the second switching elements SU2, SV2, SW2 of the three phases by the a-phase duty ratio, the B-phase duty ratio, and the C-phase duty ratio to convert the three-phase AC voltage output from the three-phase AC charger 30 into a DC voltage. Then, the battery 12 is charged with the converted DC voltage.
In the power supply device 10 according to the embodiment, when electric power is supplied from the battery 12 to the motor generator 20, the three-phase AC voltage output from the three-phase AC charger 30 can be converted into the DC voltage by the power converter 18 that converts the DC voltage output from the battery 12 into the three-phase AC voltage, and thereby the battery 12 can be charged. Thus, the power supply device 10 according to the embodiment can charge the battery 12 by the three-phase AC charger 30 without separately providing a conversion circuit for converting the three-phase AC voltage output from the three-phase AC charger 30 into a DC voltage. Accordingly, the power supply device 10 can be reduced in size and cost without providing a separate converter circuit.
Description of the reference symbols
10 power supply device
12 cell
14-system main relay device
16 capacitor part
18 power converter
20 electric generator
22 positive bus
24 negative bus
30 three-phase AC charger
32A A terminal
32B B terminal
32C C terminal
40 charging relay device
42A, 42B, 42C charging relay
44A, 44B, 44C reactor
50 charger connecting part
60 ECU
62 charging control part
64 grid signal generating part
140 reactor
C1, C2 capacitor
DU1, DU2, DV1, DV2, DW1, DW2 diodes
Neutral point of NP1
PU1, PU2, PV1, PV2, PW1 and PW2 intermediate points
SMR-B, SMR-G, SMR-P system main relay
SU1, SV1, SW1 first switch element
SU2, SV2, SW2 second switch element
SU3, SV3, SW3 third switch element
SU4, SV4, SW4 fourth switch element

Claims (1)

1. A power supply device is provided with:
a storage battery;
a capacitor unit in which a first capacitor and a second capacitor are connected in series between a positive electrode-side terminal and a negative electrode-side terminal of the battery; and
a power converter in which a three-level inverter capable of outputting a three-level voltage to a motor generator is connected in parallel with the battery in three phases of U-phase, V-phase, and W-phase, the three-level inverter being configured by a first switching element, a second switching element, a third switching element, and a fourth switching element connected in series, a first diode, and a second diode, and turns on/off the first switching element, the second switching element, the third switching element, and the fourth switching element, the first diode connecting between the first switching element and the second switching element and between the first capacitor and the second capacitor, the second diode connecting between the third switching element and the fourth switching element and between the first capacitor and the second capacitor,
the disclosed device is characterized by being provided with:
3 connection terminals electrically connectable to 3 terminals of a three-phase ac charger, at least one of between the first switching element and the second switching element or between the third switching element and the fourth switching element of each of the three-phase three-level inverters; and
the control device performs control such that, when the control device is in a state where the control device is not in a normal state,
that is, in the case where the 3 connection terminals between the first switching element and the second switching element of each of the three-level inverters of the three phases are electrically connected to the 3 terminals of the three-phase ac charger, the first capacitor is charged by the battery and the voltage of the second capacitor is set to 0V before the battery is charged by the three-phase ac charger, and when the battery is charged by the three-phase ac charger, the third switching element and the fourth switching element of the three phases are turned on and switching of on and off of the first switching element and the second switching element of the three phases is controlled so that the three-phase ac voltage output from the three-phase ac charger is converted into a dc voltage,
in the case where the 3 connection terminals between the third switching element and the fourth switching element of each of the three-level inverters are electrically connected to the 3 terminals of the three-phase ac charger, the second capacitor is charged by the battery and the voltage of the first capacitor is set to 0V before the battery is charged by the three-phase ac charger, and when the battery is charged by the three-phase ac charger, the first switching element and the second switching element of the three phases are turned on and switching of on and off of the third switching element and the fourth switching element of the three phases is controlled so that the three-phase ac voltage output from the three-phase ac charger is converted into a dc voltage.
CN202010933440.8A 2019-09-12 2020-09-08 Power supply device Withdrawn CN112477641A (en)

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Application publication date: 20210312